Hello! I'm looking for information on this ring. So I believe this must be a medallion of some sort because the back side of it appears to be flat. I asked about it on the metal detecting subreddit and someone suggested it might be related to Sol Invictus. I don't have too much information on it. Was purchased years ago from an estate sale and all I remember was the guy giving a vague description that it had been dug up (no info on where). It has some difficult to read white lettering written on the inside (clearly written relatively recently) which to me resembles some sort of inventory number from an archaeological dig (I think it says SW 3542). It is non-magnetic so I assume brass or copper perhaps. Was wondering if any of you had seen anything like it before, I took it into a coin shop but they suggested I look on the internet because they weren't familiar with it. I haven't been able to find another quite like it but would love some guidance. Value doesn't matter to me because I don't intend to sell but I'd like to know the history.